diff -ur source/config/mh-serenity source.serenity/config/mh-serenity
--- source/config/mh-serenity	1970-01-01 01:00:00.000000000 +0100
+++ source.serenity/config/mh-serenity	2021-04-11 09:20:23.857575570 +0200
@@ -0,0 +1,87 @@
+## -*-makefile-*-
+## Copyright (C) 2016 and later: Unicode, Inc. and others.
+## License & terms of use: http://www.unicode.org/copyright.html
+## Linux-specific setup
+## Copyright (c) 1999-2013, International Business Machines Corporation and
+## others. All Rights Reserved.
+
+## Commands to generate dependency files
+GEN_DEPS.c=  $(CC) -E -MM $(DEFS) $(CPPFLAGS)
+GEN_DEPS.cc= $(CXX) -E -MM $(DEFS) $(CPPFLAGS) $(CXXFLAGS)
+
+## Flags for position independent code
+SHAREDLIBCFLAGS = -fPIC
+SHAREDLIBCXXFLAGS = -fPIC
+SHAREDLIBCPPFLAGS = -DPIC
+
+## Additional flags when building libraries and with threads
+THREADSCPPFLAGS = -D_REENTRANT
+LIBCPPFLAGS =
+
+## Compiler switch to embed a runtime search path
+LD_RPATH= -Wl,-zorigin,-rpath,'$$'ORIGIN 
+LD_RPATH_PRE = -Wl,-rpath,
+
+## These are the library specific LDFLAGS
+LDFLAGSICUDT=-nodefaultlibs -nostdlib
+
+## Compiler switch to embed a library name
+# The initial tab in the next line is to prevent icu-config from reading it.
+	LD_SONAME = -Wl,-soname -Wl,$(notdir $(MIDDLE_SO_TARGET))
+#SH# # We can't depend on MIDDLE_SO_TARGET being set.
+#SH# LD_SONAME=
+
+## Shared library options
+LD_SOOPTIONS= -Wl,-Bsymbolic
+
+## Shared object suffix
+SO = so
+## Non-shared intermediate object suffix
+STATIC_O = ao
+
+## Compilation rules
+%.$(STATIC_O): $(srcdir)/%.c
+	$(call SILENT_COMPILE,$(strip $(COMPILE.c) $(STATICCPPFLAGS) $(STATICCFLAGS)) -o $@ $<)
+%.o: $(srcdir)/%.c
+	$(call SILENT_COMPILE,$(strip $(COMPILE.c) $(DYNAMICCPPFLAGS) $(DYNAMICCFLAGS)) -o $@ $<)
+
+%.$(STATIC_O): $(srcdir)/%.cpp
+	$(call SILENT_COMPILE,$(strip $(COMPILE.cc) $(STATICCPPFLAGS) $(STATICCXXFLAGS)) -o $@ $<)
+%.o: $(srcdir)/%.cpp
+	$(call SILENT_COMPILE,$(strip $(COMPILE.cc) $(DYNAMICCPPFLAGS) $(DYNAMICCXXFLAGS)) -o $@ $<)
+
+
+## Dependency rules
+%.d: $(srcdir)/%.c
+	$(call ICU_MSG,(deps)) $<
+	@$(SHELL) -ec '$(GEN_DEPS.c) $< \
+		| sed '\''s%\($*\)\.o[ :]*%\1.o $@ : %g'\'' > $@; \
+		[ -s $@ ] || rm -f $@'
+
+%.d: $(srcdir)/%.cpp
+	$(call ICU_MSG,(deps)) $<
+	@$(SHELL) -ec '$(GEN_DEPS.cc) $< \
+		| sed '\''s%\($*\)\.o[ :]*%\1.o $@ : %g'\'' > $@; \
+		[ -s $@ ] || rm -f $@'
+
+## Versioned libraries rules
+
+%.$(SO).$(SO_TARGET_VERSION_MAJOR): %.$(SO).$(SO_TARGET_VERSION)
+	$(RM) $@ && ln -s ${<F} $@
+%.$(SO): %.$(SO).$(SO_TARGET_VERSION_MAJOR)
+	$(RM) $@ && ln -s ${*F}.$(SO).$(SO_TARGET_VERSION) $@
+
+##  Bind internal references
+
+# LDflags that pkgdata will use
+BIR_LDFLAGS= -Wl,-Bsymbolic
+
+# Dependencies [i.e. map files] for the final library
+BIR_DEPS=
+
+## Remove shared library 's'
+STATIC_PREFIX_WHEN_USED = 
+STATIC_PREFIX = 
+
+## End Linux-specific setup
+
diff -ur source/config.sub source.serenity/config.sub
--- source/config.sub	2021-04-08 02:10:27.000000000 +0200
+++ source.serenity/config.sub	2021-04-11 07:59:52.531086431 +0200
@@ -1416,7 +1416,7 @@
 	      | -morphos* | -superux* | -rtmk* | -rtmk-nova* | -windiss* \
 	      | -powermax* | -dnix* | -nx6 | -nx7 | -sei* | -dragonfly* \
 	      | -skyos* | -haiku* | -rdos* | -toppers* | -drops* | -es* \
-	      | -onefs* | -tirtos* | -phoenix* | -fuchsia* | -redox*)
+	      | -onefs* | -tirtos* | -phoenix* | -fuchsia* | -redox* | -serenity*)
 	# Remember, each alternative MUST END IN *, to match a version number.
 		;;
 	-qnx*)
diff -ur source/configure source.serenity/configure
--- source/configure	2021-04-08 02:10:27.000000000 +0200
+++ source.serenity/configure	2021-04-11 09:24:04.971314734 +0200
@@ -5274,6 +5274,8 @@
 	else
 		icu_cv_host_frag=mh-cygwin-msvc
 	fi ;;
+*-serenity*)
+	icu_cv_host_frag=mh-serenity ;;
 *-*-mingw*)
 	if test "$GCC" = yes; then
                 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
